CoursesDynamic ProgrammingGrid DP
Grid DP Review
Mixed recap of the island: the up/left dependency shape and every fill order it permits, base edges as counts of one versus accumulated costs, obstacle zeroing and its shadow, the bottom-up collapse that tames ragged shapes, min-of-three square geometry, and the rolling row that shrinks O(mn) space to one row.
Dynamic Programming is part of AlgoFox Pro
You can read the whole course outline here. The exercises are in the app, along with your streak, your mistake review, and the progress that carries across your devices.
Pro starts with a 3 day free trial. The app store decides who is eligible for an introductory offer, and a lapsed subscription does not get another one.
Already subscribed in the app? Sign in with the same account and Pro works here too. Quick Play and Battle are free on the web, and so is the first course in every subject.